nav{
	width: 240px;
    margin-right: 60px;
    list-style: none;
}


.nav-title{
	display: block;
    margin: 10px 0;
    font-size: 14px;
    color: #555;
}
.nav-list{
	display: none;
}
.active{
	display: block;
}
.ul1{
	list-style: none;
    list-style-image: none;
    margin: 0;
}
.editor-style{
	font-size: 18px;
    line-height: 1.8;
}
.editor-style.img{
	width: 739px;
	height: 214px;
}
#footer3{
	position: absolute;
    right: 0;
    /* bottom: 0; */
    left: 0;
    padding: 60px 0;
    text-align: center;
    background-color: #f9f9f9;
    margin-top: 100px;
}
.call{
    width: 600px;
	position: relative;
    margin: 60px 0;
    padding: 15px 0px 15px 20px;
    border-radius: 10px;
    background-color: #f9f9f9;	
    /*margin-right: 500px;*/
}
.small_img,.big_img {
    cursor: pointer;
  } 
.black_overlay{ 
    display: none; 
    position: absolute; 
    top: 0%; 
    left: 0%; 
    width: 100%; 
    height: 100%; 
    background-color: black; 
    z-index:1001; 
    -moz-opacity: 0.8; 
    opacity:.80; 
    filter: alpha(opacity=80);  
  } 
.big_img { 
    display: none; 
    position: absolute; 
    width: 120px;
    height: 120px;
    left: 50%;
    top: 50%;
    margin: -60px 0px 0px -60px;
    z-index:1002; 
    overflow: auto; 
  }

.a1{
    color: #5bc4c7;
}
.answer2{
    display: inline-block;  /*使div块在一行内，若设置成inline的话，则属性width和height不起作用！*/
    vertical-align: middle;  /*与同一行元素中心对齐*/
    padding-right: 200px;
}
.menu {
    /*width:200px;
    height:200px;
    background-color:#3399FF;
    margin-top:100px;*/
    position: relative;
    /*position: -webkit-sticky;
    position: sticky;*/
    top: 100px;
    padding-bottom: 50px;
    list-style: none;
    padding-left: 20px;
}
.menu_1{
    position:fixed;
    /*width:200px;
    height:200px;*/
    z-index:999;
    /*background-color:#3399FF;*/
    top: 100px;
    padding-bottom: 50px;
    list-style: none;
    padding-left: 20px;
    /*top:0px;*/
    _position:absolute;
    _bottom:auto;
    _top:expression(eval(document.documentElement.scrollTop));
}
/*.menu{
    position: relative;
    position: -webkit-sticky;
    position: sticky;
    top: 100px;
    padding-bottom: 50px;
    list-style: none;
    padding-left: 100px;
}*/